"I came to Abu Bakr when he had spoken harshly to a man who had answered back. I said: 'Shall I not strike his neck (kill him)?' He rebuked me, and said: 'That is not for anyone after the Messenger of Allah (ﷺ).'"
Reference: Sunan an-Nasa'i 4076 In-book : Book 37, Hadith 111 English translation : Vol. 5, Book 37, Hadith 4081
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